Is Trump right to suggest that Putin should not have invaded Ukraine in Feb 2022? Remember that Putin filed Article 50 paperwork according to UN rules prior to invading. Did the UN or any member nation suggest any practical thing for Russia to do other than to invade? We don't really know. The evidence shows that Biden Administration would have silently encouraged the invasion, if not formally encouraging it. We are not privy to the UN nation's responses to Russia and Putin. What really went on behind the scenes? The Ukraine war is a police-action squabble among UN nations, just like the US has done police actions all over the world.